[unix-history] / sys / vm / vm_pageout.h

/* 
 * Copyright (c) 1991 Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * The Mach Operating System project at Carnegie-Mellon University.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	from: @(#)vm_pageout.h	7.3 (Berkeley) 4/21/91
 *	$Id: vm_pageout.h,v 1.2 1993/10/16 16:20:49 rgrimes Exp $
 */

/*
 * Copyright (c) 1987, 1990 Carnegie-Mellon University.
 * All rights reserved.
 *
 * Author: Avadis Tevanian, Jr.
 * 
 * Permission to use, copy, modify and distribute this software and
 * its documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 * 
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 
 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 * 
 * Carnegie Mellon requests users of this software to return to
 *
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 *
 * any improvements or extensions that they make and grant Carnegie the
 * rights to redistribute these changes.
 */

#ifndef _VM_VM_PAGEOUT_H_
#define _VM_VM_PAGEOUT_H_ 1

/*
 *	Header file for pageout daemon.
 */

/*
 *	Exported data structures.
 */

extern int	vm_pages_needed;	/* should be some "event" structure */
extern simple_lock_data_t	vm_pages_needed_lock;


/*
 *	Exported routines.
 */

/*
 *	Signal pageout-daemon and wait for it.
 */

#define	VM_WAIT		{ \
			simple_lock(&vm_pages_needed_lock); \
			thread_wakeup((int)&vm_pages_needed); \
			thread_sleep((int)&vm_page_free_count, \
				&vm_pages_needed_lock, FALSE); \
			}
#endif /* _VM_VM_PAGEOUT_H_ */
Commit	Line	Data
15637ed4 RG	1	/*
	2	* Copyright (c) 1991 Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* This code is derived from software contributed to Berkeley by
	6	* The Mach Operating System project at Carnegie-Mellon University.
	7	*
	8	* Redistribution and use in source and binary forms, with or without
	9	* modification, are permitted provided that the following conditions
	10	* are met:
	11	* 1. Redistributions of source code must retain the above copyright
	12	* notice, this list of conditions and the following disclaimer.
	13	* 2. Redistributions in binary form must reproduce the above copyright
	14	* notice, this list of conditions and the following disclaimer in the
	15	* documentation and/or other materials provided with the distribution.
	16	* 3. All advertising materials mentioning features or use of this software
	17	* must display the following acknowledgement:
	18	* This product includes software developed by the University of
	19	* California, Berkeley and its contributors.
	20	* 4. Neither the name of the University nor the names of its contributors
	21	* may be used to endorse or promote products derived from this software
	22	* without specific prior written permission.
	23	*
	24	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	25	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	26	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	27	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	28	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	29	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	30	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	31	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	32	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	33	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	34	* SUCH DAMAGE.
	35	*
1284e777	36	* from: @(#)vm_pageout.h 7.3 (Berkeley) 4/21/91
bbc3f849	37	* $Id: vm_pageout.h,v 1.2 1993/10/16 16:20:49 rgrimes Exp $
1284e777 RG	38	*/
	39
	40	/*
15637ed4 RG	41	* Copyright (c) 1987, 1990 Carnegie-Mellon University.
	42	* All rights reserved.
	43	*
	44	* Author: Avadis Tevanian, Jr.
	45	*
	46	* Permission to use, copy, modify and distribute this software and
	47	* its documentation is hereby granted, provided that both the copyright
	48	* notice and this permission notice appear in all copies of the
	49	* software, derivative works or modified versions, and any portions
	50	* thereof, and that both notices appear in supporting documentation.
	51	*
	52	* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
	53	* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
	54	* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
	55	*
	56	* Carnegie Mellon requests users of this software to return to
	57	*
	58	* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
	59	* School of Computer Science
	60	* Carnegie Mellon University
	61	* Pittsburgh PA 15213-3890
	62	*
	63	* any improvements or extensions that they make and grant Carnegie the
	64	* rights to redistribute these changes.
	65	*/
	66
bbc3f849 GW	67	#ifndef _VM_VM_PAGEOUT_H_
	68	#define _VM_VM_PAGEOUT_H_ 1
	69
15637ed4 RG	70	/*
	71	* Header file for pageout daemon.
	72	*/
	73
	74	/*
	75	* Exported data structures.
	76	*/
	77
	78	extern int vm_pages_needed; /* should be some "event" structure */
bbc3f849	79	extern simple_lock_data_t vm_pages_needed_lock;
15637ed4 RG	80
	81
	82	/*
	83	* Exported routines.
	84	*/
	85
	86	/*
	87	* Signal pageout-daemon and wait for it.
	88	*/
	89
	90	#define VM_WAIT { \
	91	simple_lock(&vm_pages_needed_lock); \
	92	thread_wakeup((int)&vm_pages_needed); \
	93	thread_sleep((int)&vm_page_free_count, \
	94	&vm_pages_needed_lock, FALSE); \
	95	}
bbc3f849	96	#endif /* _VM_VM_PAGEOUT_H_ */